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Numerical and intelligent analysis of silicon nitride laser grooving

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Abstract

A three-dimensional finite element model of evaporative laser grooving process has been developed for ceramic materials. The laser is assumed to be a continuous wave and approximated as Gaussian beam. The model can predict three-dimensional temperature distribution inside the specimen as well as resultant groove depth. By comparing the predicted groove depths with experimental data from literature, it was found that the effect of multiple reflections in deep grooves is significant. The computational model can be calibrated for deep grooves by increasing absorptivity for deeper cuts. The calibrated model was used to develop a fuzzy expert system (FES) which can reliably predict groove depth at relatively low computational costs. Fuzzy logic (FL) methodology, on the other hand, is a capable modeling tool which performs extremely robust in a nonlinear complex field with least trial data. In the fuzzy expert system, the goodness of fit was found to be 0.991, and the mean relative error was 4.714 % compared to goodness of fit of 0.897 and mean relative error of 10.675 % in finite element method (FEM). FES could successfully increase the accuracy of FEM without taking the complex phenomena of multiple reflections into computation.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia

    Pedram Parandoush & Nukman Yusoff

  2. Department of Mechanical Engineering, Military Institute of Science and Technology, Dhaka, Bangladesh

    Altab Hossain

Authors
  1. Pedram Parandoush
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  2. Altab Hossain
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  3. Nukman Yusoff
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Correspondence to Altab Hossain.

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Parandoush, P., Hossain, A. & Yusoff, N. Numerical and intelligent analysis of silicon nitride laser grooving. Int J Adv Manuf Technol 79, 1849–1859 (2015). https://doi.org/10.1007/s00170-015-6957-x

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  • DOI: https://doi.org/10.1007/s00170-015-6957-x

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